<template>
    <div>
        <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
</el-breadcrumb> 

<!-- 卡片视图 -->
<el-card>
    <!-- 添加角色按钮区域 -->
    <el-row>
        <el-col>
            <el-button type="primary">添加角色</el-button>
        </el-col>
    </el-row>
    <!-- 角色列表区域 -->

       <el-table
      :data="rolelist"
      border stripe>
      <!-- 展开列 -->
      <el-table-column type="expand">
          <template slot-scope="scope">
              <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" 
              :class="['bdbottom','vcenter', i1===0?'bdtop':'']">
               <!-- 渲染一级权限 -->

               <el-col :span="5">
                   <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                   <i class="el-icon-caret-right"></i>

               </el-col>
               <!-- 渲染二级和三级权限 -->
               <el-col :span="19">
                   <!-- 通过for循环渲染二级权限 -->
               <el-row :class="[i2===0?'bdtop':'','vcenter']" v-for="(item2,i2) in item1.children " :key="item2.id">
                   <el-col :span="6">
                       <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                   </el-col>
                   <el-col :span="18">
                       <el-tag type="warning" v-for="(item3,i3) in item2.children"
                        :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                           {{item3.authName}}
                       </el-tag>
                   </el-col>
               </el-row>
               </el-col>
              </el-row>
              <pre>
                  {{scope.row}}
              </pre>
          </template>
      </el-table-column>
      <!-- 索引列 -->
       <el-table-column
         type="index">
      </el-table-column>
      <el-table-column
        prop="roleName"
        label="角色名称"
        >
      </el-table-column>
      <el-table-column
        prop="roleDesc"
        label="角色描述"
       >
      </el-table-column>
      <el-table-column
      
        label="操作"
        width="300px">
        <template slot-scope="scope">
 <el-button type="primary" size="mini" icon="el-icon-edit" >编辑</el-button>
  <el-button type="danger" size="mini" icon="el-icon-delete" >删除</el-button>
  <el-button type="warning" size="mini" icon="el-icon-setting" @click="setRightDialog(scope.row)" >分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>
</el-card>

<!-- 分配权限的对话框 -->
<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed"

  >
  <!-- 树形控件 -->
<el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id"
 default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" 
      @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
    </div>
</template>
<script>
export default {
    
data(){
    return {
        // 所有角色列表数据
        rolelist:[],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible:false,
        // 所有权限的数据
        rightslist:[],
        // 树形控件的属性绑定对象
        treeProps:{
label:'authName',
children:'children'
        },
        // 默认选中的节点ID值数组
        defKeys:[],
        // 当前即将分配权限的角色id
        roleId:''

    }
},
created(){
    this.getRolesList()
},
methods:{
    // 获取所有角色的列表
    async getRolesList(){
      const {data:res}=await this.$http.get('roles')  
      if(res.meta.status!==200){
          return this.$message.error('获取角色列表失败！')
      }
      this.rolelist=res.data
      console.log(this.rolelist);
    },
    async removeRightById(role,rightId){
        const comfirmResult=await 
        this.$confirm(
            '此操作将永久删除该文件，是否继续？',
            '提示',
            {
                confirmButtonText:'确定',
                cancelButtonText:'取消',
                type:'warning'

            }
        ).catch(err=>err)
        if(comfirmResult!=='confirm'){
            return this.$message.info('取消了删除！')
        }
      const {data:res}=await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status!==200){
          return this.$message.error('删除权限失败')
      }
    //   this.getRolesList()
    role.children=res.data
    },

//   显示分配权限的对话框
async  setRightDialog(role){
// 获取所有权限的数据
const {data:res}=await
this.$http.get('rights/tree')
if(res.meta.status!==200){
    return this.$message.error('获取权限数据失败！')
}
// 把获取到的权限数据保存到data中
this.rightslist=res.data
console.log(this.rightslist);
// 递归获取三级节点的id
this.getLeafKeys(role,this.defKeys)
this.setRightDialogVisible=true
  },
//   通过递归的形式，获取角色下所有三级权限的ID,并保存到defKeys数组中
getLeafKeys(node,arr){
    // 如果当前node节点不包含children属性，则是三级节点
    if(!node.children){
        return arr.push(node.id)
    }
    node.children.forEach(item=>this.getLeafKeys(item,arr))
},
// 监听分配权限对话框 的关闭事件
setRightDialogClosed(){
    this.defKeys=[]
},
// 展示分配权限的duihuakuang
async showsetRightDialog(role){
    this.roleId=role.id
},
// 点击为角色分配权限
async allotRights(){
const keys=[
    ...this.$refs.treeRef.getCheckedKeys(),
    getCheckedKeys(),
    ...this.$refs.treeRef.getHalfCheckedKeys(),
    getHalfCheckedKeys()
]
const idstr=keys.join(',')
const {data:res}=await
this.$http.post(`roles/${this.roleId}/rights`,{rids:idstr})
if(res.meta.status!==200){
    return this.$message.error('分配权限失败！')
}
this.$message.success('分配权限成功！')
this.getRolesList()
this.setRightDialogVisible=false
}
  }
}
</script>
<style lang="less" scoped>
.el-tag{
    margin: 7px;

}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.bdtop{
    border-top: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>